Some modifications

Hi, I currently have free time (waiting the graduation ceremony), so I can play for a while.

Android has released a new Android Support API (NavigationDrawer & ActionBarCompat), so I want to try them with this app.

I made some modifications (make use of Fragment, ActionBar, Drawer etc) and added few more features (see README).

## Here are some screenshots:

#### In Android ICS (HTC Phone)

![2013-08-02_11-06-53](https://f.cloud.github.com/assets/3535194/899235/7eac6110-fb38-11e2-844c-634722e1c4f7.png)

![2013-08-02_11-07-05](https://f.cloud.github.com/assets/3535194/899247/05b25d90-fb39-11e2-92c4-b95261448145.png)

![2013-08-02_11-07-15](https://f.cloud.github.com/assets/3535194/899249/0aec5e1e-fb39-11e2-8833-2a27db5993c4.png)

![2013-08-02_11-08-43](https://f.cloud.github.com/assets/3535194/899252/10d5a1be-fb39-11e2-952a-a37453fbfeaf.png)

![2013-08-02_11-09-09](https://f.cloud.github.com/assets/3535194/899254/31a7610c-fb39-11e2-847b-d121f446d683.png)

![2013-08-02_11-10-06](https://f.cloud.github.com/assets/3535194/899255/3d5d7de2-fb39-11e2-96c3-59a1df4db886.png)

![2013-08-02_11-14-59](https://f.cloud.github.com/assets/3535194/899258/433704fe-fb39-11e2-969c-eb3941e52235.png)

#### In Android x86 Froyo

![screenshot - 08022013 - 10 58 13 am](https://f.cloud.github.com/assets/3535194/899262/ec0c5304-fb39-11e2-9d34-7563aed45e49.png)

![screenshot - 08022013 - 10 59 51 am](https://f.cloud.github.com/assets/3535194/899285/e0703fd2-fb3a-11e2-8b77-43f0d98fdbd9.png)

![screenshot - 08022013 - 11 01 21 am](https://f.cloud.github.com/assets/3535194/899287/f0b14936-fb3a-11e2-93b8-6fee1c09dff8.png)

![screenshot - 08022013 - 11 02 14 am](https://f.cloud.github.com/assets/3535194/899288/f5916e4a-fb3a-11e2-909d-1775d98f8c38.png)


## PS
+ Additional texts still need correct Japanese translation (I used Google Translate)
+ In Google Play, it's still the older version.